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  • Title: Anti-idiotypic antibodies mimic bovine viral diarrhea virus antigen.
    Author: Xue W, Orten DJ, Abdelmagid OY, Rider M, Blecha F, Minocha HC.
    Journal: Vet Microbiol; 1991 Nov; 29(3-4):201-12. PubMed ID: 1722928.
    Abstract:
    Polyclonal rabbit anti-idiotypic antibodies (anti-ids) against two neutralizing murine monoclonal antibodies (mAbs) specific to a bovine viral diarrhea virus (BVDV) glycoprotein, 53 kDa, were produced, purified, and characterized. Each anti-id inhibited the binding of its respective mAb to BVDV antigen in a competitive ELISA and blocked the immunoprecipitation of the 53 kDa protein by the mAb. The anti-ids also inhibited the virus-neutralizing activity of their homologous mAbs. These results suggest that the anti-ids bear an internal image of a BVDV antigen and mimic neutralizing epitopes on the 53 kDa protein. Treatment of MDBK cells with the anti-ids inhibited BVDV infection, indicating that they block a cellular component, such as a virus receptor, required for virus adsorption or entry. Inhibition of the homologous mAb and lack of inhibition of the heterologous mAb indicate that the anti-ids are specific for the unique antigen-binding sites on the mAbs.
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